Property from a Private Collection, Palm Beach, Florida.&nbsp;Georgia OKeeffe (1887-1986), The Red Maple at Lake George, painted in 1926. 36 x 30 in (91.4 x 76.2 cm). Estimate $7,000,000-10,000,000. This lot is offered in&nbsp;American Art&nbsp;on 20 November 2018 at Christie&rsquo;s in New York